CN113685916B - An air conditioning system and its control method - Google Patents

An air conditioning system and its control method

Info

Publication number
CN113685916B
CN113685916B CN202010427299.4A CN202010427299A CN113685916B CN 113685916 B CN113685916 B CN 113685916B CN 202010427299 A CN202010427299 A CN 202010427299A CN 113685916 B CN113685916 B CN 113685916B
Authority
CN
China
Prior art keywords
heat exchanger
outdoor heat
compressor
control valve
conditioning system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010427299.4A
Other languages
Chinese (zh)
Other versions
CN113685916A (en
Inventor
孙楠楠
蒋贤国
石鑫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Shandong Air Conditioning Co Ltd
Hisense Air Conditioning Co Ltd
Original Assignee
Hisense Shandong Air Conditioning Co Ltd
Hisense Air Conditioning Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hisense Shandong Air Conditioning Co Ltd, Hisense Air Conditioning Co Ltd filed Critical Hisense Shandong Air Conditioning Co Ltd
Priority to CN202010427299.4A priority Critical patent/CN113685916B/en
Publication of CN113685916A publication Critical patent/CN113685916A/en
Application granted granted Critical
Publication of CN113685916B publication Critical patent/CN113685916B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
    • F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioning system and a control method thereof, relates to the technical field of air conditioners, and aims to solve the problem that an air conditioner is prone to frosting. The invention comprises a compressor and a main refrigerant loop, wherein an indoor heat exchanger, a throttling device and an outdoor heat exchanger assembly are sequentially connected in series on the main refrigerant loop, the outdoor heat exchanger assembly comprises a first outdoor heat exchanger and a second outdoor heat exchanger which are mutually connected in parallel, a first control valve is arranged on the main refrigerant loop, a second control valve is arranged on a pipeline between the first outdoor heat exchanger and the compressor and is connected in parallel with the second outdoor heat exchanger, a third control valve is arranged on a pipeline between the second outdoor heat exchanger and the throttling device and is connected in parallel with the first outdoor heat exchanger, one end of a connecting branch is communicated with the second control valve, the other end of the connecting branch is communicated with the third control valve, the second control valve controls the first outdoor heat exchanger to be communicated with the compressor or the connecting branch, and the third control valve controls the second outdoor heat exchanger to be communicated with the connecting branch or the throttling device.

Description

Air conditioning system and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
An air conditioner is a common household appliance, and consists of a refrigerating compressor, a condenser, a capillary tube, an evaporator, an electromagnetic reversing valve, a filter, a refrigerant and the like, so that the aim of refrigerating or heating is fulfilled.
When the existing air conditioner heats and runs in winter, frosting phenomenon is easy to occur to the heat exchanger of the outdoor unit, defrosting is needed to be frequently performed, indoor heating is stopped in the defrosting process, and indoor comfort is poor.
Disclosure of Invention
The invention provides an air conditioning system and a control method thereof, which are used for solving the problem that air is easy to frost in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The invention provides an air conditioning system which comprises a compressor, a refrigerant main loop, a connecting branch, a second control valve, a first control valve, a third control valve and a third control valve, wherein the refrigerant main loop is used for connecting an exhaust port of the compressor with the indoor heat exchanger component, or connecting an exhaust port of the compressor with the indoor heat exchanger, or connecting an air inlet of the compressor with the outdoor heat exchanger component, the indoor heat exchanger component comprises a first outdoor heat exchanger and a second outdoor heat exchanger which are mutually connected in parallel, the first control valve is arranged on the refrigerant main loop, the first control valve is used for controlling the exhaust port of the compressor to be communicated with the indoor heat exchanger component, or controlling the exhaust port of the compressor to be communicated with the indoor heat exchanger, or connecting the air inlet of the compressor to be communicated with the outdoor heat exchanger component, the second control valve is arranged on a pipeline between the first outdoor heat exchanger and the compressor in parallel, and the first control valve is used for connecting the second control valve with the first control valve to be connected with the first control valve and the second control valve to be connected with the second control valve and the first control valve and the second control valve to be connected with the third control valve to be connected with the outdoor heat exchanger in parallel.
In some possible embodiments of the present invention, the air conditioning system further comprises a heat recovery branch and a heat recovery device, wherein the heat recovery branch is connected between the compressor and the throttling device and is connected with the indoor heat exchanger in parallel, the heat recovery device comprises a first heat exchange flow path and a second heat exchange flow path which are mutually heat exchanged, the first heat exchange flow path is connected to a pipeline between the outdoor heat exchanger component and the throttling device, and the second heat exchange flow path is connected to the heat recovery branch, so that heating and defrosting can be performed simultaneously, and liquid impact can be prevented.
In some possible embodiments of the invention, the air conditioning system further comprises a first regulating valve mounted on the regeneration branch and located between the second regeneration flow path of the regenerator and the throttling device.
In some possible embodiments of the invention, the air conditioning system further comprises a second regulating valve mounted on the regeneration branch and located between the second regeneration flow path of the regenerator and the compressor.
In a second aspect, the invention provides a control method for the air conditioning system according to the technical scheme, which comprises the following steps that when a heating control signal is received, the first control valve controls the exhaust port of the compressor to be communicated with the indoor heat exchanger, the air suction port of the compressor to be communicated with the outdoor heat exchanger assembly, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction port of the compressor, the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device, and when a refrigerating control signal is received, the first control valve controls the exhaust port of the compressor to be communicated with the outdoor heat exchanger assembly, the air suction port of the compressor to be communicated with the indoor heat exchanger, the second control valve controls the first outdoor heat exchanger to be communicated with the connecting branch, and the third control valve controls the second outdoor heat exchanger to be communicated with the connecting branch.
In some possible embodiments of the present invention, the air conditioning system further includes a first control valve and a second control valve, the first control valve being mounted on the regeneration branch and located between a second regeneration flow path of the regenerator and the throttle device, the second control valve being mounted on the regeneration branch and located between the second regeneration flow path of the regenerator and the compressor, the control method further including, when it is detected that the air conditioning system satisfies a defrost condition, the first control valve controlling an exhaust port of the compressor to communicate with the indoor heat exchanger, an intake port of the compressor to communicate with the outdoor heat exchanger assembly, the second control valve controlling the first outdoor heat exchanger to communicate with the intake port of the compressor, the third control valve controlling the second outdoor heat exchanger to communicate with the throttle device, opening the first control valve and the second control valve, and when it is detected that the air conditioning system satisfies a defrost stop condition, closing the first control valve and the second control valve.
In some possible embodiments of the present invention, the control method of the air conditioning system further includes adjusting the opening degree of the first regulating valve when it is detected that the pressure of the refrigerant on the regenerative branch near the end opening of the compressor is different from the pressure of the refrigerant on the indoor heat exchanger near the end opening of the compressor after the first regulating valve and the second regulating valve are opened.
In some possible embodiments of the present invention, the control method of the air conditioning system further includes, after receiving the refrigeration control signal, opening the first regulating valve and the second regulating valve when it is detected that the suction superheat degree of the air conditioning system is in a first preset temperature range and the duration of the suction superheat degree of the air conditioning system in the first preset temperature range is greater than a preset time, and closing the first regulating valve when the suction superheat degree of the air conditioning system is in a second preset temperature range.
In some possible embodiments of the present invention, the control method of the air conditioning system further includes adjusting the opening degree of the second regulating valve when detecting that the refrigerant pressure on the regenerative branch near the opening of the first control valve is different from the refrigerant pressure on the indoor heat exchanger near the opening of the throttle device after the first regulating valve and the second regulating valve are opened.
The air conditioning system comprises a compressor, an indoor heat exchanger, a throttling device and an outdoor heat exchanger component which are sequentially connected in series on a main loop of a refrigerant, wherein a first control valve on the main loop of the refrigerant can control the air outlet of the compressor to be communicated with the outdoor heat exchanger component, the air suction inlet of the compressor to be communicated with the indoor heat exchanger, or the air outlet of the compressor to be communicated with the indoor heat exchanger, and the air suction inlet of the compressor to be communicated with the outdoor heat exchanger component, so that the refrigerating or heating operation mode of the air conditioner is switched. Compared with the prior art, the outdoor heat exchanger assembly comprises a first outdoor heat exchanger, a second control valve, a third control valve and a connecting branch, wherein the first outdoor heat exchanger and the second outdoor heat exchanger are mutually connected in parallel, the second control valve is arranged on a pipeline between the first outdoor heat exchanger and the compressor and is connected in parallel with the second outdoor heat exchanger, the third control valve is arranged on a pipeline between the second outdoor heat exchanger and the throttling device and is connected in parallel with the first outdoor heat exchanger, one end of the connecting branch is communicated with the second control valve, and the other end of the connecting branch is communicated with the third control valve. When the air conditioning system is in a heating mode, the first outdoor heat exchanger and the second outdoor heat exchanger are both positioned at the low pressure side of the main loop of the refrigerant, are sensitive to the pressure loss of the refrigerant, and the pressure loss of the refrigerant in the outdoor heat exchanger group needs to be reduced as much as possible, so the first outdoor heat exchanger can be controlled to be communicated with the air suction port of the compressor through the second control valve, the second outdoor heat exchanger can be controlled to be communicated with the throttling device through the third control valve, namely the first outdoor heat exchanger is connected with the second outdoor heat exchanger in parallel, the refrigerant from the throttling device is divided into two paths and respectively enters the first outdoor heat exchanger and the second outdoor heat exchanger, compared with the refrigerant from the throttling device which sequentially enters the first outdoor heat exchanger and the second outdoor heat exchanger, the pressure loss of a single-way pipeline is reduced, the frosting problem of an outdoor heat exchanger component is slowed down, the comfort of affecting the indoor temperature due to frequent defrosting is avoided, and meanwhile, the outlet pressure of the outdoor heat exchanger component and the heat exchange efficiency of the outdoor heat exchanger component are improved; when the air conditioning system is in a refrigerating mode, the first outdoor heat exchanger and the second outdoor heat exchanger are both positioned at the high pressure side of the main loop of the refrigerant and are insensitive to the pressure loss of the refrigerant, so that the first outdoor heat exchanger can be controlled to be communicated with the connecting branch through the second control valve, the second outdoor heat exchanger is controlled to be communicated with the connecting branch through the third control valve, namely the first outdoor heat exchanger and the second outdoor heat exchanger are connected in series, the refrigerant coming out of the throttling device sequentially enters the first outdoor heat exchanger and the second outdoor heat exchanger, the heat exchange time of the refrigerant in the outdoor heat exchanger assembly can be prolonged, and the heat exchange efficiency is higher.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a refrigerant flow of an air conditioning system in a heating defrost cycle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a refrigerant flow of an air conditioning system in a heating cycle according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a refrigerant flow of an air conditioning system in a refrigeration anti-surge cycle according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a flow of a refrigerant when the air conditioning system is in refrigeration according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present invention, "and/or" is merely an association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and that three cases of a alone exist, a and B together, and B alone exist. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The air conditioner performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies a refrigerant to the air that has been conditioned and heat exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.
Referring to fig. 1 and 2, the air conditioning system according to the embodiment of the present invention includes a compressor 1, and a main refrigerant circuit connecting an exhaust port of the compressor 1 and an intake port of the compressor 1 as a circuit, wherein the main refrigerant circuit is sequentially connected in series with an indoor heat exchanger 2, a throttling device 3, and an outdoor heat exchanger assembly 4, the outdoor heat exchanger assembly 4 includes a first outdoor heat exchanger 41 and a second outdoor heat exchanger 42 connected in parallel, a first control valve 5 is further installed on the main refrigerant circuit, and the first control valve 5 is used for controlling the exhaust port of the compressor 1 to communicate with the outdoor heat exchanger assembly 4, the intake port of the compressor 1 to communicate with the indoor heat exchanger 2, or controlling the exhaust port of the compressor 1 to communicate with the indoor heat exchanger 2, and the intake port of the compressor 1 to communicate with the outdoor heat exchanger assembly 4. The air conditioning system further comprises a second control valve 6, a third control valve 7 and a connecting branch 11, wherein the second control valve 6 is arranged on a pipeline between the first outdoor heat exchanger 41 and the compressor 1 and is connected with the second outdoor heat exchanger 42 in parallel, the third control valve 7 is arranged on a pipeline between the second outdoor heat exchanger 42 and the throttling device 3 and is connected with the first outdoor heat exchanger 41 in parallel, one end of the connecting branch 11 is communicated with the second control valve 6, the other end of the connecting branch 11 is communicated with the third control valve 7, the second control valve 6 is used for controlling the first outdoor heat exchanger 41 to be communicated with the compressor 1 or the connecting branch 11, and the third control valve 7 is used for controlling the second outdoor heat exchanger 42 to be communicated with the connecting branch 11 or the throttling device 3.
The air conditioning system of the embodiment of the invention comprises a compressor 1, an indoor heat exchanger 2, a throttling device 3 and an outdoor heat exchanger component 4 which are sequentially connected in series on a main refrigerant circuit, wherein a first control valve 5 on the main refrigerant circuit can control the exhaust port of the compressor 1 to be communicated with the outdoor heat exchanger component 4, the air suction port of the compressor 1 to be communicated with the indoor heat exchanger 2, or the exhaust port of the compressor 1 to be communicated with the indoor heat exchanger 2, and the air suction port of the compressor 1 to be communicated with the outdoor heat exchanger component 4, so that the refrigerating or heating operation mode of the air conditioner is switched. In contrast to the prior art, the outdoor heat exchanger assembly 4 of the embodiment of the present invention includes the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 connected in parallel to each other, and the second control valve 6, the third control valve 7, and the connection branch 11, the second control valve 6 is installed on the pipe between the first outdoor heat exchanger 41 and the compressor 1 and connected in parallel to the second outdoor heat exchanger 42, the third control valve 7 is installed on the pipe between the second outdoor heat exchanger 42 and the throttle device 3 and connected in parallel to the first outdoor heat exchanger 41, one end of the connection branch 11 is communicated with the second control valve 6, and the other end of the connection branch 11 is communicated with the third control valve 7. When the air conditioning system is in a heating mode, the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are both positioned at the low pressure side of the main refrigerant circuit and are sensitive to the pressure loss of the refrigerant, and the pressure loss of the refrigerant in the outdoor heat exchanger group 4 needs to be reduced as much as possible, so that the first outdoor heat exchanger 41 can be controlled to be communicated with the air suction port of the compressor 1 through the second control valve 6, the second outdoor heat exchanger 42 is controlled to be communicated with the throttling device 3 through the third control valve 7, namely the first outdoor heat exchanger 41 is connected with the second outdoor heat exchanger 42 in parallel, the refrigerant coming out of the throttling device 3 is divided into two paths and respectively enters the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42, and compared with the refrigerant coming out of the throttling device 3, the pressure loss of a single-way pipeline is reduced, the problem of a heat exchanger component is slowed down, the problem of frequently forming the heat exchanger component is avoided, the indoor temperature is influenced, and meanwhile, the heat exchanger component pressure efficiency of the outdoor heat exchanger is improved; when the air conditioning system is in a refrigerating mode, the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are both positioned at the high pressure side of the main circuit of the refrigerant and are insensitive to the pressure loss of the refrigerant, so that the first outdoor heat exchanger 41 can be controlled to be communicated with the connecting branch 11 through the second control valve 6, the second outdoor heat exchanger 42 can be controlled to be communicated with the connecting branch 11 through the third control valve 7, namely the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42 are connected in series, the refrigerant coming out of the throttling device 3 sequentially enters the first outdoor heat exchanger 41 and the second outdoor heat exchanger 42, the heat exchange time of the refrigerant in the outdoor heat exchanger assembly can be prolonged, the heat exchange efficiency is higher.
In some possible embodiments of the present invention, the air conditioning system further comprises a heat recovery branch 12 and a heat recovery unit 8, wherein the heat recovery branch 12 is connected between the compressor 1 and the throttling device 3 and is connected in parallel with the indoor heat exchanger 2, the heat recovery unit 8 comprises a first heat exchange flow path 81 and a second heat exchange flow path 82 which exchange heat with each other, the first heat exchange flow path 81 is connected on a pipeline between the outdoor heat exchanger assembly 4 and the throttling device 3, and the second heat exchange flow path 82 is connected on the heat recovery branch 12. Referring to fig. 1, when the air conditioning system performs a heating and defrosting mode, since the high-temperature refrigerant in the second heat exchange flow path 82 of the regenerator 8 can increase the temperature of the refrigerant in the first heat exchange flow path 81 of the regenerator 8, the temperature of the refrigerant entering the outdoor heat exchanger assembly 4 is higher, the outdoor heat exchanger assembly 4 can be defrosted, the air conditioning system can perform heating and defrosting processes simultaneously, start and stop of the compressor 1 are avoided, the state of the first control valve 5 is frequently changed (such as frequently commutated), the defrosting speed is faster, the indoor comfort is higher, and the service life of the air conditioning machine is prolonged. Referring to fig. 3, when the air conditioning system performs the cooling mode, since the high temperature refrigerant in the first heat exchange flow path 81 of the regenerator 8 can increase the temperature of the refrigerant in the second heat exchange flow path 82 of the regenerator 8, the temperature of the refrigerant entering the indoor heat exchanger 2 is reduced, that is, the refrigerant entering the indoor heat exchanger 2 is pre-cooled, so that the heat exchange of the indoor heat exchanger 2 is more sufficient, and after the refrigerant of the indoor heat exchanger 2 and the refrigerant with higher temperature from the second heat exchange flow path 82 in the regenerator 8 are combined, the temperature of the combined refrigerant can be increased, and the amount of liquid refrigerant in the combined refrigerant is reduced, thereby effectively avoiding the risk of liquid impact of the compressor 1 and prolonging the service life of the compressor 1.
In order to ensure that the pressure of the refrigerant flowing out of the heat recovery branch 12 is the same as the pressure of the refrigerant flowing out of the indoor heat exchanger 2 in the heating mode of the air conditioning system, so as to avoid the problem of refrigerant backflow caused by pressure difference, the air conditioning system of the embodiment of the invention further comprises a first regulating valve 9, wherein the first regulating valve 9 is arranged on the heat recovery branch 12 and is positioned between the second heat exchange flow path 82 of the heat regenerator 8 and the throttling device 3.
Similarly, in order to ensure that the pressure of the refrigerant flowing out of the heat recovery branch 12 is the same as the pressure of the refrigerant flowing out of the indoor heat exchanger 2 in the cooling mode of the air conditioning system, so as to avoid the problem of refrigerant backflow caused by pressure difference, the air conditioning system according to the embodiment of the invention further comprises a second regulating valve 10, wherein the second regulating valve 10 is installed on the heat recovery branch 12 and is positioned between the second heat recovery flow path of the heat recovery unit 8 and the compressor 1.
The first control valve 5 is an electronic reversing valve or an electromagnetic reversing valve, the second control valve 6 and the third control valve 7 are three-way control valves, the first regulating valve 9 and the second regulating valve 10 are electronic expansion valves, and the throttle device 3 is also an electronic expansion valve.
The embodiment of the invention also comprises a control method for the air conditioning system in the embodiment, which comprises the following steps:
when receiving the heating control signal, the first control valve controls the exhaust port of the compressor to be communicated with the indoor heat exchanger, the air suction port of the compressor to be communicated with the outdoor heat exchanger component, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction port of the compressor, and the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device.
When receiving refrigeration control signals, the first control valve controls the exhaust port of the compressor to be communicated with the outdoor heat exchanger component, the air suction port of the compressor to be communicated with the indoor heat exchanger, the second control valve controls the first outdoor heat exchanger to be communicated with the connecting branch, and the third control valve controls the second outdoor heat exchanger to be communicated with the connecting branch.
The control method of the air conditioning system in the embodiment of the present invention can achieve the same technical effects as those of the air conditioning system in the above embodiment, and will not be described here again.
The air conditioning system further comprises a first regulating valve and a second regulating valve, wherein the first regulating valve is arranged on the regenerative branch and positioned between the second regenerative flow path of the regenerator and the throttling device, the second regulating valve is arranged on the regenerative branch and positioned between the second regenerative flow path of the regenerator and the compressor, and the control method further comprises the following steps:
When the air conditioning system is detected to meet the defrosting condition, the first control valve controls the air outlet of the compressor to be communicated with the indoor heat exchanger, the air suction inlet of the compressor is communicated with the outdoor heat exchanger assembly, the second control valve controls the first outdoor heat exchanger to be communicated with the air suction inlet of the compressor, the third control valve controls the second outdoor heat exchanger to be communicated with the throttling device, and the first regulating valve and the second regulating valve are opened.
When the air conditioning system is detected to meet the defrosting stop condition, the first regulating valve and the second regulating valve are closed.
The defrosting condition and the defrosting stop condition are both the prior art, for example, the defrosting condition is that the temperature of the refrigerant in the first outdoor heat exchanger (or the second outdoor heat exchanger, or the first outdoor heat exchanger and the second outdoor heat exchanger) is smaller than a first preset defrosting temperature, the duration that the temperature of the refrigerant in the first outdoor heat exchanger is smaller than the first preset defrosting temperature is longer than a first preset time, and the defrosting stop condition is that the temperature of the refrigerant in the first outdoor heat exchanger (or the second outdoor heat exchanger, or the first outdoor heat exchanger and the second outdoor heat exchanger) is longer than a second preset defrosting temperature. The outdoor heat exchanger assembly is provided with a temperature sensor, and the temperature sensor detects the temperature of the refrigerant in the first outdoor heat exchanger, the temperature of the refrigerant in the second outdoor heat exchanger, or the temperature of the refrigerant in the first outdoor heat exchanger and the temperature of the refrigerant in the second outdoor heat exchanger. The air conditioning system further includes a timer for timing a duration of time that the temperature of the refrigerant in the first outdoor heat exchanger (or the second outdoor heat exchanger, or both) is less than the first preset defrost temperature.
The control step can realize simultaneous heating and defrosting, avoid starting and stopping of the compressor, and has higher defrosting speed and higher indoor comfort level.
After the first regulating valve and the second regulating valve are opened, the control method according to the embodiment of the invention further includes:
And when detecting that the pressure of the refrigerant on the regenerative branch close to the opening at one end of the compressor is different from the pressure of the refrigerant on the indoor heat exchanger close to the opening at one end of the compressor, adjusting the opening of the first regulating valve.
The first pressure sensor is arranged at the opening part of the regenerative branch close to one end of the compressor, and can detect the pressure of the refrigerant of the regenerative branch close to the opening part of one end of the compressor, and the second pressure sensor is arranged at the opening part of the indoor heat exchanger close to one end of the compressor, and can detect the pressure of the refrigerant of the regenerative branch close to the opening part of one end of the compressor. The opening degree of the first regulating valve is regulated to ensure that the pressure of the refrigerant on the regenerative branch close to the opening at one end of the compressor is the same as the pressure of the refrigerant on the indoor heat exchanger close to the opening at one end of the compressor, so that the problem of refrigerant backflow is avoided.
Based on the above embodiment, the control method of the air conditioning system further includes:
after receiving the refrigeration control signal, when detecting that the suction superheat degree of the air conditioning system is in a first preset temperature range and the duration time of the suction superheat degree of the air conditioning system in the first preset temperature range is longer than preset time, opening the first regulating valve and the second regulating valve.
And when the suction superheat degree of the air conditioning system is in a second preset temperature range, closing the first regulating valve.
The air-conditioning system may have a suction superheat degree in a first preset temperature range, where the suction superheat degree of the air-conditioning system is lower than a preset temperature (e.g., 0 ℃), the suction superheat degree is equal to a suction temperature minus a saturation temperature corresponding to a suction pressure, the suction temperature is a temperature at which the refrigerant enters the compressor, the suction temperature is detected by a temperature sensor installed at an air suction port of the compressor, the suction pressure is detected by a pressure sensor installed at the air suction port of the compressor, and a duration of the air-conditioning system in which the suction superheat degree of the air-conditioning system is lower than the preset temperature is counted by the timer. The air-conditioning system air suction superheat degree is in the second preset temperature range, and the air-conditioning system air suction superheat degree can be 0-5 ℃.
When the air conditioning system is in refrigeration and the suction superheat degree of the air conditioning system is detected to be in a first preset temperature range, and the duration of the suction superheat degree of the air conditioning system in the first preset temperature range is longer than the preset time (namely, the liquid impact prevention condition is met), the temperature of the refrigerant flowing out of the second heat exchange flow path of the heat regenerator and the temperature of the refrigerant flowing out of the indoor heat exchanger after the refrigerant is converged can be improved by opening the first regulating valve and the second regulating valve (the air conditioning system enters the refrigeration liquid impact prevention mode), the amount of liquid refrigerant in the refrigerant after the refrigerant is converged is reduced, so that the risk of effectively avoiding the liquid refrigerant from being injected into the compressor is avoided, and the service life of the compressor is prolonged. When the suction superheat degree of the air conditioning system is in the second preset temperature range (i.e. the liquid impact prevention end condition is satisfied), as shown in fig. 4 in combination with fig. 3, the first regulating valve 9 and the second regulating valve 10 are closed, so that the refrigerant enters the indoor heat exchanger.
Similarly, when the air conditioning system is in the refrigeration anti-liquid impact mode, the control method further comprises, after opening the first regulating valve and the second regulating valve:
And when detecting that the pressure of the refrigerant on the regenerative branch, which is close to the opening at one end of the first control valve, is different from the pressure of the refrigerant on the indoor heat exchanger, which is close to the opening at one end of the throttling device, the opening of the second regulating valve is regulated.
And a third pressure sensor is arranged at the opening part of the regenerative branch close to one end of the first control valve, the third pressure sensor can detect the pressure of the refrigerant at the opening part of the regenerative branch close to one end of the first control valve, a fourth pressure sensor is arranged at the opening part of the indoor heat exchanger close to one end of the throttling device, and the fourth pressure sensor can detect the pressure of the refrigerant at the opening part of the indoor heat exchanger close to one end of the throttling device. According to the control method, the opening degree of the second regulating valve is regulated, so that the pressure of the refrigerant on the regenerative branch, which is close to the opening of one end of the first regulating valve, is identical to the pressure of the refrigerant on the indoor heat exchanger, which is close to the opening of one end of the throttling device, and the problem of refrigerant backflow is avoided.
When the defrosting stop condition is met, the first regulating valve and the second regulating valve are closed, the preset time (such as 3 minutes) is waited, whether the defrosting condition is met or not is verified again, and if yes, the defrosting mode is entered again, so that the defrosting effect is ensured. Similarly, when the air conditioning system is in the liquid impact prevention ending condition, the first regulating valve and the second regulating valve are closed, the preset time (such as 3 minutes) is waited, whether the liquid impact prevention condition is met or not is verified again, if so, the liquid impact prevention mode is entered again, and therefore the safety of the air conditioning system is ensured.
In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present invention should be included in the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (8)

1.一种空调系统，其特征在于，包括:1. An air conditioning system, characterized in that it comprises: 压缩机；compressor; 制冷剂主回路，所述制冷剂主回路将所述压缩机的排气口、所述压缩机的吸气口连接为回路，所述制冷剂主回路上依次串联有室内换热器、节流装置、室外换热器组件，所述室外换热器组件包括相互并联的第一室外换热器和第二室外换热器；The refrigerant main circuit connects the compressor's discharge port and the compressor's suction port into a loop. An indoor heat exchanger, a throttling device, and an outdoor heat exchanger assembly are connected in series on the refrigerant main circuit. The outdoor heat exchanger assembly includes a first outdoor heat exchanger and a second outdoor heat exchanger connected in parallel. 第一控制阀，所述第一控制阀安装在所述制冷剂主回路上，所述第一控制阀用于控制所述压缩机的排气口与所述室外换热器组件连通、所述压缩机的吸气口与所述室内换热器连通，或控制所述压缩机的排气口与室内换热器连通、所述压缩机的吸气口与所述室外换热器组件连通；A first control valve is installed on the refrigerant main circuit. The first control valve is used to control the compressor's discharge port to connect with the outdoor heat exchanger assembly and the compressor's suction port to connect with the indoor heat exchanger, or to control the compressor's discharge port to connect with the indoor heat exchanger and the compressor's suction port to connect with the outdoor heat exchanger assembly. 连接支路；Connecting branch lines; 第二控制阀，所述第二控制阀安装在所述第一室外换热器与所述压缩机之间的管道上、且与所述第二室外换热器并联；The second control valve is installed on the pipeline between the first outdoor heat exchanger and the compressor, and is connected in parallel with the second outdoor heat exchanger; 第三控制阀，所述第三控制阀安装在所述第二室外换热器与所述节流装置之间的管道上、且与所述第一室外换热器并联，所述连接支路的一端与所述第二控制阀连通，所述连接支路的另一端与所述第三控制阀连通，所述第二控制阀用于控制所述第一室外换热器与所述压缩机或所述连接支路连通，所述第三控制阀用于控制所述第二室外换热器与所述连接支路或所述节流装置连通；The third control valve is installed on the pipeline between the second outdoor heat exchanger and the throttling device and is connected in parallel with the first outdoor heat exchanger. One end of the connecting branch is connected to the second control valve, and the other end of the connecting branch is connected to the third control valve. The second control valve is used to control the first outdoor heat exchanger to connect with the compressor or the connecting branch, and the third control valve is used to control the second outdoor heat exchanger to connect with the connecting branch or the throttling device. 回热支路，所述回热支路连接在所述压缩机与所述节流装置之间、且与所述室内换热器并联；A regenerative branch is connected between the compressor and the throttling device, and is connected in parallel with the indoor heat exchanger; 回热器，所述回热器包括相互换热的第一换热流路和第二换热流路，所述第一换热流路连接在所述室外换热器组件与所述节流装置之间的管路上，所述第二换热流路连接在所述回热支路上。The regenerator includes a first heat exchange flow path and a second heat exchange flow path that exchange heat with each other. The first heat exchange flow path is connected to the pipeline between the outdoor heat exchanger assembly and the throttling device, and the second heat exchange flow path is connected to the regenerator branch. 2.根据权利要求1所述的空调系统，其特征在于，还包括：2. The air conditioning system according to claim 1, characterized in that it further comprises: 第一调节阀，所述第一调节阀安装在所述回热支路上、且位于所述回热器的第二回热流路与所述节流装置之间。A first regulating valve is installed on the regenerating branch and located between the second regenerating flow path of the regenerator and the throttling device. 3.根据权利要求1或2所述的空调系统，其特征在于，还包括：3. The air conditioning system according to claim 1 or 2, characterized in that it further comprises: 第二调节阀，所述第二调节阀安装在所述回热支路上、且位于所述回热器的第二回热流路与所述压缩机之间。The second regulating valve is installed on the regenerating branch and located between the second regenerating flow path of the regenerator and the compressor. 4.一种用于上述权利要求1～3中任一项所述的空调系统的控制方法，其特征在于，包括以下步骤：4. A control method for an air conditioning system according to any one of claims 1 to 3, characterized in that it comprises the following steps: 当接收到制热控制信号时，所述第一控制阀控制所述压缩机的排气口与所述室内换热器连通、所述压缩机的吸气口与所述室外换热器组件连通，所述第二控制阀控制所述第一室外换热器与所述压缩机的吸气口连通，所述第三控制阀控制所述第二室外换热器与所述节流装置连通；When a heating control signal is received, the first control valve controls the compressor's exhaust port to connect with the indoor heat exchanger and the compressor's suction port to connect with the outdoor heat exchanger assembly; the second control valve controls the first outdoor heat exchanger to connect with the compressor's suction port; and the third control valve controls the second outdoor heat exchanger to connect with the throttling device. 当接收到制冷控制信号时，所述第一控制阀控制所述压缩机的排气口与所述室外换热器组件连通、所述压缩机的吸气口与所述室内换热器连通，所述第二控制阀控制所述第一室外换热器与所述连接支路连通，所述第三控制阀控制所述第二室外换热器与所述连接支路连通。When a refrigeration control signal is received, the first control valve controls the compressor's exhaust port to connect with the outdoor heat exchanger assembly and the compressor's suction port to connect with the indoor heat exchanger; the second control valve controls the first outdoor heat exchanger to connect with the connecting branch; and the third control valve controls the second outdoor heat exchanger to connect with the connecting branch. 5.根据权利要求4所述的空调系统的控制方法，其特征在于，还包括第一调节阀和第二调节阀，所述第一调节阀安装在所述回热支路上、且位于所述回热器的第二回热流路与所述节流装置之间，所述第二调节阀安装在所述回热支路上、且位于所述回热器的第二回热流路与所述压缩机之间，所述控制方法还包括：5. The control method for an air conditioning system according to claim 4, characterized in that it further includes a first regulating valve and a second regulating valve, wherein the first regulating valve is installed on the regenerating branch and located between the second regenerating flow path of the regenerator and the throttling device, and the second regulating valve is installed on the regenerating branch and located between the second regenerating flow path of the regenerator and the compressor, and the control method further includes: 当检测到所述空调系统满足除霜条件时，所述第一控制阀控制所述压缩机的排气口与所述室内换热器连通、所述压缩机的吸气口与所述室外换热器组件连通，所述第二控制阀控制所述第一室外换热器与所述压缩机的吸气口连通，所述第三控制阀控制所述第二室外换热器与所述节流装置连通，打开所述第一调节阀和所述第二调节阀；When the air conditioning system is detected to meet the defrosting conditions, the first control valve controls the compressor's exhaust port to connect with the indoor heat exchanger and the compressor's suction port to connect with the outdoor heat exchanger assembly; the second control valve controls the first outdoor heat exchanger to connect with the compressor's suction port; the third control valve controls the second outdoor heat exchanger to connect with the throttling device; and the first regulating valve and the second regulating valve are opened. 当检测到所述空调系统满足除霜停止条件时，关闭所述第一调节阀和所述第二调节阀。When the air conditioning system is detected to meet the defrost stop condition, the first regulating valve and the second regulating valve are closed. 6.根据权利要求5所述的空调系统的控制方法，其特征在于，在所述打开所述第一调节阀和所述第二调节阀之后，还包括：6. The control method for an air conditioning system according to claim 5, characterized in that, after opening the first regulating valve and the second regulating valve, it further includes: 当检测到所述回热支路上靠近压缩机一端开口的制冷剂压力与所述室内换热器靠近压缩机一端开口的制冷剂压力不同时，调节所述第一调节阀的开度。When the refrigerant pressure at the end of the regenerator branch near the compressor is detected to be different from the refrigerant pressure at the end of the indoor heat exchanger near the compressor, the opening of the first regulating valve is adjusted. 7.根据权利要求5所述的空调系统的控制方法，其特征在于，还包括：7. The control method for an air conditioning system according to claim 5, characterized in that it further comprises: 在接收到制冷控制信号后，当检测到空调系统的吸气过热度处于第一预设温度范围、且所述空调系统的吸气过热度处于第一预设温度范围的持续时间大于预设时间时，打开所述第一调节阀和所述第二调节阀；Upon receiving a cooling control signal, when the superheat of the air intake of the air conditioning system is detected to be within a first preset temperature range, and the duration of the superheat of the air intake of the air conditioning system within the first preset temperature range is greater than a preset time, the first regulating valve and the second regulating valve are opened. 当空调系统的吸气过热度处于第二预设温度范围时，关闭所述第一调节阀。When the intake superheat of the air conditioning system is within the second preset temperature range, the first regulating valve is closed. 8.根据权利要求7所述的空调系统的控制方法，其特征在于，在所述打开所述第一调节阀和所述第二调节阀之后，还包括：8. The control method for an air conditioning system according to claim 7, characterized in that, after opening the first regulating valve and the second regulating valve, it further includes: 当检测到所述回热支路上靠近第一控制阀一端开口处的制冷剂压力与所述室内换热器上靠近节流装置一端开口处的制冷剂压力不同时，调节所述第二调节阀的开度。When the refrigerant pressure at the opening near the first control valve on the regenerative branch is detected to be different from the refrigerant pressure at the opening near the throttling device on the indoor heat exchanger, the opening of the second regulating valve is adjusted.
CN202010427299.4A 2020-05-19 2020-05-19 An air conditioning system and its control method Active CN113685916B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010427299.4A CN113685916B (en) 2020-05-19 2020-05-19 An air conditioning system and its control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010427299.4A CN113685916B (en) 2020-05-19 2020-05-19 An air conditioning system and its control method

Publications (2)

Publication Number Publication Date
CN113685916A CN113685916A (en) 2021-11-23
CN113685916B true CN113685916B (en) 2026-03-20

Family

ID=78576010

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010427299.4A Active CN113685916B (en) 2020-05-19 2020-05-19 An air conditioning system and its control method

Country Status (1)

Country Link
CN (1) CN113685916B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114508786B (en) * 2022-02-17 2024-06-14 珠海格力电器股份有限公司 Air conditioning system, control method and control device of air conditioning system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1743749A (en) * 2004-09-01 2006-03-08 海尔集团公司 Refrigerating system for heat pump air conditioner and its realizing method
CN201811509U (en) * 2010-09-13 2011-04-27 广州天河兰石技术开发有限公司 A refrigeration device with adjustable evaporating pressure and flow rate
CN104764112A (en) * 2015-04-19 2015-07-08 上海交通大学 Air conditioning system achieving indoor uninterruptible heating in defrosting process

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203298405U (en) * 2013-05-20 2013-11-20 南京迪泽尔空调设备有限公司 Air source heat pump unit increasing flowing speed of refrigerating fluid
JP2015102311A (en) * 2013-11-27 2015-06-04 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． Air conditioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1743749A (en) * 2004-09-01 2006-03-08 海尔集团公司 Refrigerating system for heat pump air conditioner and its realizing method
CN201811509U (en) * 2010-09-13 2011-04-27 广州天河兰石技术开发有限公司 A refrigeration device with adjustable evaporating pressure and flow rate
CN104764112A (en) * 2015-04-19 2015-07-08 上海交通大学 Air conditioning system achieving indoor uninterruptible heating in defrosting process

Also Published As

Publication number Publication date
CN113685916A (en) 2021-11-23

Similar Documents

Publication Publication Date Title
EP2719966B1 (en) Refrigeration air-conditioning device
US9506674B2 (en) Air conditioner including a bypass pipeline for a defrosting operation
KR101872784B1 (en) Outdoor heat exchanger
CN203231415U (en) A multi-connected air conditioning system
CN104061705A (en) Two-stage compression air conditioning system and control method thereof
JP2008224088A (en) Water heater
CN110173941B (en) Air conditioning system
CN101469926A (en) Improved air conditioner defrosting system and its control method
US11555639B2 (en) HVAC system
CN103363707B (en) Heat pump type air conditioner
CN112050399A (en) Air conditioner
US12313303B2 (en) Air conditioner
CN112665216A (en) Heat pump system and defrosting mode thereof
CN111219803A (en) Multi-split air conditioner and defrosting method thereof
KR100821728B1 (en) Air conditioning system
JP2557577B2 (en) Air conditioner
JP4654828B2 (en) Air conditioner
CN213089945U (en) Air conditioner
KR101872783B1 (en) Outdoor heat exchanger
CN113685916A (en) Air conditioning system and control method thereof
CN111121352A (en) A continuous defrosting refrigeration control system to reduce heat leakage
CN215951814U (en) Air conditioning unit
JP4622901B2 (en) Air conditioner
KR101100009B1 (en) Air conditioning system
CN208968098U (en) Condenser and air conditioner system with defrost reversing valve

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
CB02 Change of applicant information
CB02 Change of applicant information

Address after: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao

Applicant after: Hisense Air Conditioning Co.,Ltd.

Address before: 266100 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao

Applicant before: HISENSE (SHANDONG) AIR-CONDITIONING Co.,Ltd.

SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant